always been pretty much a grower, especially as I've gotten older. I'm thinking that when I was younger and "showed", it was because I was partially turned on, sporting a "chubby". as I get older, it takes a little more to turn me on, than a pretty face and some flirting.
my wife(then my gf) freaked out one day when we were dating & driving around, and she started messing with my soft cock, rubbing outside on my jeans. and in seconds, I was hard and poking over the top of my jeans. this soft to hard big cock in seconds has always amazed her + a fat cock on a skinny guy.